Electric switch



H. J. HAMMERLY ELECTRIC SWITCH Filed NOV. 20, 1937 INVENTOR lgrima/wl Bv TTORNEY Paten-ted oci. 24, 1939 UNITED STATES PATENT.x OFFICE Company,Plainville, Connecticut or to The Trumbull Electric Manufacturing Conn.,a corporation of Application November 20, 1937, Serial No. 175,603

7 Claims.

My invention relates particularly to enclosed or safety type switchesand has for its main object to provide convenientv and satisfactorymeans for padlocking or sealing the actuating handle either in the offor on position. Another object is to rigidly and positively lock thehandle to the correlated locking and interlocking members.

In its preferred form the invention contemplates the use of a U-shapedanchorage member fitted to m the pivoted end of the handle and acombined stop and anchorage member secured to the wall of the box orswitch receptacle adjacent the pivot of the handle and the crank shaft.

Fig. 1 is a front view of a switchstructure em- 13 bodying one form.of-my invention, part of the cover being broken away to. disclose partof .ther` interior switch mechanism.

Fig. 2 is a side view of the same.

Fig. 3 is a fragmentary section showing the handle and the anchoragerlugs on a large scale.- Fig. 4 is an exploded perspective View of thehandle and the stops and anchorage lugs.A

Fig. 5 is a perspective'view of the rearv o'f the hub end of thehandle.;

The box body 1has a cover 8 which is hinged at 9 and may be providedwith the usual latch IIJ and any suitable form of interlock and a gripmember. II t facilitate opening and closing the cover. f 30 The switchmechanism per se may be of any suitable type, for instance with a hingedknife blade I2.and an operating crank I3 inside the box. 'I'he actuatinghandle I4 on theoutside of the box has a bearing portion I supported inan openlng in the side wall concentric with the end of the crank shaft."This bearing-together with discs I8, I8 and' I9 constitutes the hub ofthe actuating mechanism, the parts of which are held together yandsecured to the handle by screws or rivets I1. 'I'he disc I8 is larger indiameter than the bearing I5 so as to overlap the rim of the bearingopening. The end of the crank shaft extends into and has a bearing inthe hub structure as shown in 3.

The invention is preferably applied to switches having some suitable.form of quick make and quick break mechanism such as the oscillator andthe spring pressed throwing member 2 I. oscillator 20 is mounted betweenthe discs I6 and I9 and has a lost motion 'connection directly orindirectly with the connector rivets I1 and a lost motion connectionwith the arm of the crank shaft I3 as is common in switches of thischaracter.

'I'he switch is actuated in a well known manner -by throwing the handleI4 from the position shown in full lines (Fig. 1) to the position shownin dotted lines or vice versa.

A plate 22 is secured to the side wall ofthe box adjacent the hub of thehandle and provided with projecting stops 24, 25 to serve as abutmentsfor 5 the handle. Between these stops is an anchorage lug 26 integralwiththe plate 2 2 and projecting at right angles to the side wall ofthebox.

Attached tothe handle is a U-shaped anchorage member preferably formedof sheet metal with a 10 base21 and lugs 28 and 29. 'Ihe base 21 of thismember is located in a recess 30 formed in the inner side of the handleand the lugs 28, 29 overlap the edges'of the handle. 'I'he rivets I1hold the parts of the hub and the anchorage member l5 together. The lugs26, 28 and 29 are preferably made large enough to accommodate a numberof padlocks 3| or other sealing devices-so that the Y -'switch mechanismmay be secured. either in the off or on position,.and that it mayrequire 20.

lthe concurrent action of a number of peopleto actuate the switch.

The switch is also preferably prov1dedw1th a suitable form of interlockbetween the cover and the actuating mechanism lasiscustomary with 25.switches of this type. Thispreferably rtakes the form of the lockingcam-like member I8 coacting with the latch 32 which in turn interlockswith the pin 33 carried by the cover as shown in Patent No. y 1,310,163dated July 15,` 1 919. $0

As considerable strain may be brought to bear on the locking discv I8, Iprovide'extension lugs 34 on the bearing hub part I5 which project intothe openings 35 in theA disc and thus take the strain independently ofthervets I1.

. In assembling the parts the bearing hub part I5 and the lugs 34 arethrust through the opening 36 in the plate 21 so that the plate isproperly positioned on the end of the handle. The bearingportion I5 isthen inserted through the wallL of the 40 box and the lugs 34 areinserted in the openings 35, 35 in the interlocker disc or plate I8.'I'he parts are then connected by means of rivets such as I1 and all ofthe operating strain on the plate I8 and the anchorage plate 21 is takenup independ- 45 ently of the rivets.

I claim: 1. In an electric switch, a box, switch mechanism within thebox, an operating handle pivoted in a Wall of the box, a plate securedto said wall 50 adjacent the pivot of the handle and having stopshoulders for the handlefat opposite ends and an intermediate anchoragelug, and two anchorage lugs secured to the handle adjacent its pivot andadapted to be alternately moved to register with 1 CII the lug of saidplate as the handle is moved to o or on position. i

2. In an electric switch, a box, switch mechanism within the box, anoperating handle pivoted in a wall of the box, a combined stop andanchorage lug secured to said wall adjacent the pivot yolf the handle, aU-shaped member secured to the inner surface of the handle adjacent itspivot and having two integral outwardly projecting anchorage lugsadapted to be alternately moved so as to register with the lug of saidplate.

3. In an electric switch, a box, switch mechanism within the box, anoperating handle pivoted in a wall of the box, a combined stop andanchorage lug secured to said wall adjacent the pivot oi' the handle, aU-shaped sheet metal member secured to the handle adjacent its pivot andhaving two integral anchorage lugs adapted to be alternately moved so asto register with the lug of said plate as the handle is moved to off oron position.

4. In an electric switch. a. box, switch mechanism within the box, anoperating handle pivoted to a wall of the box, a plate secured to saidwall ,adjacent the pivot of the handle and having stop shoulders for thehandle at opposite ends and an intermediate anchorage lug, a U-shapedmember secured to the handle adjacent its pivot and having two anchoragelugs adapted to be alternately moved so as to register with the lug ofsaid plate when the handle is moved to the oi or on" position.

5. An enclosed switch having a box with a bearing opening in one of itsstationary walls, switch actuating means including an external handlehaving an integral hub support in said bearing opening and integralextensions projecting vfrom said .hub inside of the box, a cover for thebox, and interlocking means for the cover including a perforated lockingdisc mounted on said hub exl tensions inside the box, a' perforateddisc-like member adjacent the locking disc and rivet-like means passingthrough the perforations in the discs and through the extensions on thehandle to secure the discs in position.

`ating disc mounted on said eccentric extension in the box so that itrotates with said handle and its hub, an inner perforated disc adjacentsaid actuating disc and a rivet extending transversely through said hub,said extension, said actuating disc and said inner disc and holding saidparts together laterally free of shearing stress, said eccentricextension withstanding substantially the entire rotative stress betweenthe handle hub and the actuating disc.

'7. In an enclosed switch, a box having a bearing opening in one of'itsstationary walls, switch actuating means including an external handlehaving an integral hub supported in said bearing opening and integralextensions projecting from said hub inside of said wall, a cover for thebox, interlocking means including a perforated locking disc mounted onsaid extensions inside the box, an inner perforated disc-like member atthe inner face of said locking disc and fastening devices extendingthrough,. the extensions on said handle and through the perforations insaid discs to secure the discs in position, said extensions taking upsubstantially the entire rotative operating stress between said handleand said locking disc.

HERMAN J. HAMMERLY.

